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Diffstat (limited to 'arch/x86/kernel/ima_arch.c')
-rw-r--r--arch/x86/kernel/ima_arch.c94
1 files changed, 0 insertions, 94 deletions
diff --git a/arch/x86/kernel/ima_arch.c b/arch/x86/kernel/ima_arch.c
deleted file mode 100644
index 7dfb1e808928..000000000000
--- a/arch/x86/kernel/ima_arch.c
+++ /dev/null
@@ -1,94 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * Copyright (C) 2018 IBM Corporation
- */
-#include <linux/efi.h>
-#include <linux/module.h>
-#include <linux/ima.h>
-
-extern struct boot_params boot_params;
-
-static enum efi_secureboot_mode get_sb_mode(void)
-{
- efi_guid_t efi_variable_guid = EFI_GLOBAL_VARIABLE_GUID;
- efi_status_t status;
- unsigned long size;
- u8 secboot, setupmode;
-
- size = sizeof(secboot);
-
- if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) {
- pr_info("ima: secureboot mode unknown, no efi\n");
- return efi_secureboot_mode_unknown;
- }
-
- /* Get variable contents into buffer */
- status = efi.get_variable(L"SecureBoot", &efi_variable_guid,
- NULL, &size, &secboot);
- if (status == EFI_NOT_FOUND) {
- pr_info("ima: secureboot mode disabled\n");
- return efi_secureboot_mode_disabled;
- }
-
- if (status != EFI_SUCCESS) {
- pr_info("ima: secureboot mode unknown\n");
- return efi_secureboot_mode_unknown;
- }
-
- size = sizeof(setupmode);
- status = efi.get_variable(L"SetupMode", &efi_variable_guid,
- NULL, &size, &setupmode);
-
- if (status != EFI_SUCCESS) /* ignore unknown SetupMode */
- setupmode = 0;
-
- if (secboot == 0 || setupmode == 1) {
- pr_info("ima: secureboot mode disabled\n");
- return efi_secureboot_mode_disabled;
- }
-
- pr_info("ima: secureboot mode enabled\n");
- return efi_secureboot_mode_enabled;
-}
-
-bool arch_ima_get_secureboot(void)
-{
- static enum efi_secureboot_mode sb_mode;
- static bool initialized;
-
- if (!initialized && efi_enabled(EFI_BOOT)) {
- sb_mode = boot_params.secure_boot;
-
- if (sb_mode == efi_secureboot_mode_unset)
- sb_mode = get_sb_mode();
- initialized = true;
- }
-
- if (sb_mode == efi_secureboot_mode_enabled)
- return true;
- else
- return false;
-}
-
-/* secureboot arch rules */
-static const char * const sb_arch_rules[] = {
-#if !IS_ENABLED(CONFIG_KEXEC_SIG)
- "appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig",
-#endif /* CONFIG_KEXEC_SIG */
- "measure func=KEXEC_KERNEL_CHECK",
-#if !IS_ENABLED(CONFIG_MODULE_SIG)
- "appraise func=MODULE_CHECK appraise_type=imasig",
-#endif
- "measure func=MODULE_CHECK",
- NULL
-};
-
-const char * const *arch_get_ima_policy(void)
-{
- if (IS_ENABLED(CONFIG_IMA_ARCH_POLICY) && arch_ima_get_secureboot()) {
- if (IS_ENABLED(CONFIG_MODULE_SIG))
- set_module_sig_enforced();
- return sb_arch_rules;
- }
- return NULL;
-}